104523821 has 4 divisors (see below), whose sum is σ = 104570172. Its totient is φ = 104477472.

The previous prime is 104523787. The next prime is 104523823. The reversal of 104523821 is 128325401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128325401 = 17 ⋅7548553.

It can be written as a sum of positive squares in 2 ways, for example, as 45832900 + 58690921 = 6770^2 + 7661^2 .

It is a cyclic number.

It is not a de Polignac number, because 104523821 - 2¹⁰ = 104522797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104523823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19610 + ... + 24363.

It is an arithmetic number, because the mean of its divisors is an integer number (26142543).

Almost surely, 2^104523821 is an apocalyptic number.

It is an amenable number.

104523821 is a deficient number, since it is larger than the sum of its proper divisors (46351).

104523821 is an equidigital number, since it uses as much as digits as its factorization.

104523821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46350.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 104523821 is about 10223.6892069350. The cubic root of 104523821 is about 471.0551531678.

The spelling of 104523821 in words is "one hundred four million, five hundred twenty-three thousand, eight hundred twenty-one".